Emergence of different species of white grub beetles in relation to abiotic factors based on light trap catches.

摘要

The emergence pattern of white grub beetles (Holotrichia sp.) in relation with abiotic factors (temperature, relative humidity and rainfall) using light trap was studied in Haryana, India, during the 2005 kharif season. The emergence of white grub started from 18th standard week after the first pre-monsoon rainfall of the season. A total of 13 species (1998 beetles) of white grubs were reported with maximum number of beetles of Holotrichia consanguinea (1214 beetles), followed by H. serrata (382 beetles). The peak emergence of beetles was reported in the month of July. White grub emergence was positively correlated to the temperature, relative humidity and rainfall. Emergence of H. consanguinea was positively correlated to the temperature, relative humidity and rainfall. For H. serrata, temperature and relative humidity had the least correlation to beetle emergence, but the rainfall occurrence favoured the beetle emergence. The other important species Anomala dorsalis, A. bengalensis and A. varicolor also had significant correlation with these abiotic factors.